Arthur Reinhold Upgren, the John Monroe Van Vleck Professor of Astronomy, Emeritus, died on Jan. 21, a month before his 84th birthday. Upgren received his PhD from Case Western Reserve University before coming to Wesleyan as an assistant professor in 1966. He was the Director of the Van Vleck Observatory from 1973 to 1993. He held his endowed chair from 1982 until his retirement in 2000. Upgren was an author or co-author of 285 publications in the astronomical literature, including one that appeared in 2016. His research interests were in the areas of parallax (distance measurement) of stars and galactic…